Sizing device for surface grinders



J. A. DOANE SIZING DEVICE FOR SURFACE GRINDERS Jan. 17, 1 928.

2 Sheets-Sheet 1 Original Filed May 1923 J. A. DOANE sxzme DEVICE FORsqnmcn snmmsas Jan. 17, 1928.

2 Sheets-Shut 2 IIll/EIITUR By W ATTORNEY Original Filed May 1923 l UUMW MHWHHMH Patented Jan. 17, 1928.

UNITED STATES I 1,656,347 PATENT OFFICE.

JOHN A. DOANE, WEST HARTFORD, CONNECTICUT, ASSIGNOB TO PRATT & WHI'I-NEY COMPANY, 0! NEW YORK, N. Y., A CORPORATION OF NEW JRSEY.

SIZING DEVICE FOB SURFACE GBINDERS.

Original application filed Kay 81, 1828, Serial No. 848,618. Divided andthis application filed August 18,

1985. Serial 10. 50,087.

This invention relates to surface grinding machines and in particular asizing device therefor enabling an operator to determine the progress ofand completion of the grind.

ing operation, and is a division ofmy oopending application Serial No.642,613, filed May 31, 1923.

An object of the present invention is to provide a small member adjacentthe work support adapted to be abraded by the work contacting surface ofthe wheel.

Another object of the invention is to mount an indicator on the memberadjacent the work table, the indicator having its movable pointeractuated b ga ing the abraded sur ace of the member. further object ofthe invention is to provide means permitting said member to be fed asmall amount after the completion of each grinding operation so that 1twill contact with and be abraded by the wheel during each successivegrinding operation.

With these and other objects in view, my invention consists in thefeatures of construc- 26 tion and operation set forth inthe followingspecification andv illustrated in the accompanying'drawings. v

v In the accompanying drawings annexed hereto and forming a part of thisspecification, I have shown my invention embodied in a vertical surface.grinder in which a ver- ;tically movable wheel abrades work mounted on arotatin table, the plane of which is fixed, but it wi 1' be understoodthat the invention can be otherwise embodied and that the drawings arenot to be construed as definin or limiting the $00 in relied uponforthat purpose. 40 [n the drawin Fi re 1 is a out elevation of grin erhaving the present mventlon an the -work tableWand preferabl anextension enof the invention, the c aims appended tot e specificationbe.-

of partin its broadest my in-" vention comprises: first, a surfacegrindin machine havmg a work supporting table an a. rotatable abrasivewheel, one of these members being mounted so that it can move towardtheother during, the grinding operation; second, a, member mountedadjacent rotatable at a slow speed; third, means to eed this memberafter each grinding operation so that it will becontacted by the wheeldurin each operation; and fourth,'an indicator 9. apted to contact withthe wheel engaging surface of the member. 1

Referring more in detail to the figures of the drawing, a verticalsurface|gr1ndcr is disclosed having ,a base 10 and column 11. Within thebase 10 is a table 12 which may be rotated by anypreferred or usualmeans. On the columnll is a slidable head 13 carry ingia rotatablegrinding wheel 14 at its lower As these parts may corres 0nd exactly tothose disclosed in my copen ing application Serial No. 642,613, filedMay 31, 1923, it is not thought that further description is necessary.The invention, it will be understood, is applicable to surface grindingmachines in which either the wheel li is movable toward the work table12 during operation or the work table 12 is moved toward the wheel '14.The former only of. these forms of the invention is illustrated.

Adjacent the work table 12 is a relativelg; small member 15 on the upperend of a sha 16. This member and its shaft 16 rotate about an axisparallel to the axis of rotation of the work table. The shaft 16, therotat member 15 and attached parts are carried h a bracket 17 adjustablyclamped to a gui ewa formed in a portion of t e column 11. e shaft 16 mabe rotated by means of a driving she 18 connected through bevel gears19and 20 to a sleeve 21 surrounding the shaft 16 carrying the rotatablemember 15. The sleeve 21 is, as shown,

splined to the shaft 16 so that the shaft 16 Y may be moved axiallywhileit is being rotated. Preferably the member 15 on the up- 7 per end ofthe shaft 16 is removably attached so that other similar members may beeasily substituted when one is worn out. It 1s made of any suitablematerial such as cast iron which may be readily abraded bg the wheel 14while acting upon the work lank W. on the table 12. Also theupper end ofported on the upper end of a. sleeve 24.

. 1ts position vertically. B

In order to a just into sition and feed the rotatable member 15 orwardlyor upwardly after the completion of each grindin operation, the sleeve24 is suitably supported in the bracket 17 and has an elongated threadedportion 25 on its lower 'end. Surrounding this sleeve 24- and engaginits threaded portion 15 is a gear 26. Mes g with the teeth of this gear26 is a pinion 27 on the upper end of a splined shaft 28 supportedwithin the bracket 17. In a supplementary bracket 29 a ratchet wheel 30is provided splined t0 the shaft 28 andadapted to be engaged by a pawl31 on a rod 32 movable within the bracket 29. The end of this rod 32extends beyond the bracket 29. and may be engaged either by the hand ofthe operator or by a lever controlling the movements of parts of thegrinding machine. With each longitudinal movement of the rod 32 or.

plunger the ratchet wheel 30 and the splined rod 28 are rotated slightlyso that the sleeve 24 is slightly elevated by rotation of the gear 26upon the threaded portions 25 of the sleeve 24. To prevent rotation ofthe sleeve 24 during rotation of the gear 26, a detent 32 is providedwhich is adapted to engage a short spline or recess formed in the sleeve24. To remove the sleeve 24, if necessary, it is only required to removethe detent 32 from the recess or spline. For this purpose the detent 32is mounted on a manually movable and spring pressed plunger 33.

From the above description it will be seen that a small rotatable andabradable member 15 is provided adjacent the work table 12 having asurface adapted to be engaged and abraded by the wheel 14. Also meansare provided to rotate the member 15 and means of the bracket 17supporting the eeve 24 carrying .the member 15 and attached parts, theposition of the surface on themember abraded by the wheel 14 maybeadju'sted vertically. This adjustment is made each time the are set upfor operation with work W 0 any one finished thicknes'. When oneadjustment is made, however, it is not H to be chan until other work ba; of materially erent thiekn are operated Adapted to contact with theupper surface of the rotatable member 15 is an 40outstandingfromaverticalrodfl. This rod41issupportedwithinbedrin42inanthe movable mahber 44 of I --fixedinpositiontoflieupper-mdcfthe upwardextensionmfitothebrachetl'lsupportingthesleevefiandilsattadiedTherodflisafladiedatilsuppermdto anmdicator bracketl mam .fed upwardly.

er 46, moved by the vertical movement of the rod 41, is rovided movableabout a. graduated dial. e position of the surface of the rotatingmember 15 therefore can beat all times determined after a first workblank has been abraded and tested.

The operation of the indicating device Wlll now be described. Thebracket 17 is first adjusted to a position so that the rotating member15 is slightly higher than the upper surface of a finished blank W. vThesurface of the member 15 contacted with by the wheel 14 will be abradedby the wheel as the wheel is fed downward during its operation upon thework W. When the workW has been reduced to its finished dimension theupper surface of the work W-and the u per surface of the rotating member15 will at the same height, that is, in the same plane. The indicator 45is then set by adjusting the length of the rod 40 so that, with theextension 40 resting upon the surface of the rotating member 15 whenwork has been completely ground, the inter 46 will stand over the zeroof the sea e of aduations' on the dial. When the finishe work W has beenremoved and other blanks mounted on the table 12 the rotating member 15is elevated by movement of the plunger 32 and r0- tation of the gear 26on the threaded ortion of the sleeve 22. When the whee again lowered toengage the work W it will en age and ahrade the rotating member 15before W is'reached. The rotating member 15 will thereafter be abradedsimultaneously with the work blank W, and, with abrasion of the thefinal dimension of the work blank IOtllilllg member 15 the indicatorpointer 46 will be moved until, when the finished dimension'of the workblank W is reached, the

pointer 46 of the indicator will a in stand over the zero of thegraduated dial. During this period when the wheel 14 simultaneouslyabrades the work pieces W on the supporting table 12 and the rotatingmember 15, the pointer 46 of the indicator will indicate the progress ofthe grinding. With each successive operation upon blank W on thetable 12the rotating member 15 is worn away an amount us] to the distance it iser a number of operations the member 15'may-be removed and a new onesubstituted and adjusted to position as stated above.

What I claim is: g

1. A sizing device" for surface grinders comprising in combination, awork supportingtable, a wheel support, means to rotate .said'wheel, mean'to cause relative moveparls. ment between said'table and wheel su PP aadjacmt the work table adapted to contact with and'be'abraded by theworkcontacting surface of the wheel, and min dicator having a movable bar incontact with preferably0ffll6dil1millMlwtlmabradedsurfaceofsaidmmberwhereby a, reading of saidindicator will determine 7 the progress of the grinding operation.

said wheel, means to cause relative movement .between said table andwheel su port, a

grinding operations.

member adjacent said table a member ad'acent the work table apted tocontact wit and beabraded b the work contacting surface. of the whee,.an indicator having a movable bar in contact with the abraded surfaceof said member whereby the reading of said indicator will determine theprogress of the rindin operation, and means to advance t e mem r forsuccessive 3. A sizing device for surface grinders comprising incombination, a worksupporting table, a wheel support, means to rotateand wheel, means to move said wheel sup port toward said table duringoperation, a apted to contact with and be abraded by the work contacting surface of the wheel, means to rotate saidmember about an axisparallel to the axis of rotation of the work table during 0 eration, andan indicator hav a movab e bar in contact with the abrad surface of saidmember whereby the reading of said indicator will determine. theprogress of the grindingo tion. f tit-siz ng device for comprisingincombination, awork supportsaid wheel, means to cause indicator havi.with said mem r whereby the reading of ing table, a wheel support,means to rotate bet 1 em a i'fii" "35 weensa1 eanw su' -a i table.rotatable member adjacent said wor adapted to contact with and beabraded b the workv contacting surface of the whee and a dial indicatorhaving a pointer attached to a movable bar in contact withthe abradedsurface of said member whereby movement of said indicator interdetermines the progress of the grinding operation.

5. A sizing device for surface. grinders comprising in combination, awork supporting and rotating table, a wheel support,

means to rotate said wheel, means to cause.

re}llatilve movemulnt betvzheen said table and w ee support ur1 e'operation, a rotatable mem r m work table adapted to contact with and beabraded by the work contacting surface of the wheel,

means to rotate said member about an ans parallel to the axis ofrotation of said table, means toadvance said rotatable member axiallyafter each grinding operation, and an a movable bar in contact saidindicator may determine the progress of .the grinding operation.

In testimony whereof, I hereto afix my Jonas noun

